Zika's origin and global spread

March 2, 2016 3:51 PM

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Feb. 17: Brazil investigating potential link between Zika and 4,443 suspected cases of microcephaly. Of those, 508 confirmed as microcephaly and most of those cases are linked to the virus. WHO seeks $56 million to fight Zika.

Feb. 18: CDC adds Aruba and Bonaire to countries and territories with active outbreaks, bringing total to 32.